I think it's a better way of replacing annoying ads. I embedded a code to my site from CoinImp (site at https://www.coinimp.com) because I was barely making no earns with Coinhive because of 30% on fees.. and it's going smoothly. I'm offering a hosting service and my customers are more than satisfied with this new way of doing transactions. They mine for me, I have no annoying ads to show and they enjoy services I'm offering. It's a win-win.